Winchester's Silvertip Handgun ammunition remains one of the most dependable and performance-proven handgun cartridges ever created. Originally developed for Law Enforcement to replace traditional hollow point bullets, Super-X Silvertip handgun ammunition continues to offer a unique combination of power, precision, reliable functioning, and on-target performance via a specially engineered jacketed bullet. This bullet delivers optimum penetration and rapid energy release with virtually no weight loss or bullet fragmentation. Symbol: X40SWSTHP Caliber: 40 Smith & Wesson Bullet Weight: 155 Grains Bullet Type: Silvertip Hollow Point User Guide: Personal Protection Test Barrel Length: 4" Velocity (Feet Per Second): - Muzzle: 1205 - 50yds: 1096 - 100yds: 1018 Energy (Foot Pounds): - Muzzle: 500 - 50yds: 414 - 100yds: 357 Mid-Range Trajectory: - 50yds: 0.8" - 100yds: 3.6" Manufactures Website Address www.winchester.com Warranty Information Warranted against manufacturers defects.